Only on chapter 38, but my guess is that the "original" protagonist in Ch1 was a transmigrator that possessed Yue Kongmin
(spoilers)
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after reading the latest chapters, I'm even more sure that's the case. The shadowy antagonist was definitely the transmigrator that Qingqiu killed in the first chapter. I also think that Kongmin definitely retained some memories of the previous timelines. That's where I feel his hesitance to get close to her while everyone else celebrates come from, because he still feels some guilt about what the previous TL Kongnim did to her, even if he wasn't the one who did it.
This is an original manhua so I can't read up on spoilers. I just wanna know the true identity of this run's Yue Kongmin and it's killing me